Rings Plus Pi Bonds Formulation
For molecules containing only carbon, hydrogen, monovalent halogens, nitrogen, and oxygen, the formula
where C = number of carbons, H = number of hydrogens, X= number of halogens and N = number of nitrogens, gives an equivalent result. Oxygen and other divalent atoms do not contribute to the degree of unsaturation, as (2-2) = 0.
The degree of unsaturation is used to calculate the number of rings and pi bonds, where
- Rings count as one degree of unsaturation
- Double bonds count as one degree of unsaturation
- Triple bonds count as two degrees of unsaturation
Read more about this topic: Degree Of Unsaturation
Famous quotes containing the words rings, bonds and/or formulation:
“We will have rings and things, and fine array,
And kiss me, Kate, we will be married o’ Sunday.”
—William Shakespeare (1564–1616)
“For, truly speaking, whoever provokes me to a good act or thought has given me a pledge of his fidelity to virtue,—he has come under the bonds to adhere to that cause to which we are jointly attached.”
—Ralph Waldo Emerson (1803–1882)
“In necessary things, unity; in disputed things, liberty; in all things, charity.”
—Variously Ascribed.
The formulation was used as a motto by the English Nonconformist clergyman Richard Baxter (1615-1691)